DL_T 439-2018火力发电厂高温紧固件技术导则.pdf

ICS 27.100F 20DL备案号：631202018中华人民共和国电力行业标准DL/T 439—2018代替 DL/T 439—2006火力发电厂高温紧固件技术导则The technical guide for high-temperature bolt of fossil-fired power plant2018-04-03发布201807-01实施国家能源局发布 DL/T439—2018目次前言·范围·2规范性引用文件选材原则检验与更换报废5螺栓的紧固与拆卸6技术档案管理，附录A（资料性附录）常用螺栓材料的化学成分、力学性能附录B（资料性附录）常用螺栓材料的热处理工艺10附录C（规范性附录）20CrIMo1VNbTiB高温螺栓钢的晶粒分级及评定方法 DL / T 439-2018~0tor0 ‘N~0SOr0 iN~0t00 N~SE0rO N~0100 ‘NCoi 2.5~3.5Co: ≤0.25Fe: 24.00~00z害等100~0081 100Fe:余量100≤W0600≤1.00其他--0100100100°00.005z0001111-~1001n≤0.201≤0.101--≤0.50-0S00c00%S10r00z003Al11S003-s003~S000.14-111-≤0.40~110090~00SE0Ss0qN1--~0500.45~0.65~02°0OE00A11--M-1-~06°01.100.15~11--表A1(续)Mo~SL01.00~SL01.00~06°00.60~060~0500.80~SE00.50~0011.10~08°01.10一-~06°01.30~06°0~00lt05z1~000l12.00~000111.0010.00~11.00~02:0110.8010.5~11.5000~5E0~040IN0.85~0E00.60~00°97000E~0ss06OL≤0.025≤0.025≤0.0155100s100≥01003SS100%≤0.030≤0.010dsz002003ST003100≤0.020≤0.0150E003≤0.015Mn~0°0$90~0t°009°0.05008°0~0008°0~000~0t009°0~05008°0~SE0$900S0%0010.60~0t°009°0050%0500S0≤0.15~0t°0≤0.15~0200.60≤0.100S00S13IS0.17~ECO0.17~0~10910~II00.15~00%800380°020Cr1Mo1V20Cr1Mo1V22Cr12NiW18Cr11NiMo20Cr11MoNiWINiVNbN2Cr11Mo1V.NA9NINONMON9N8L9HDR-26GH414506 DL/T 439—2018A.2需用媒栓材料的力学性能见表A.2.表A.2常用螺栓材料的力学性能室温力学性能（不低于）温强度牌号Rp0.2Re4KuMIH试验温度MPaMPaMPa%%Ja.MPa35265510184355146~196400118- 454039 187~229400 81186 20CrMoA490L9144055 197~24113725535CrMoA (50mm)590765144047241~285475-16735CrMeA (≤50mm4047 255~311--42CrMoA (64mm5050 241~302-42CrMoA (≤64mm)720860165047255~321--40CoMoV5034*255~32145Cr1MoVA725825185034a302一25CY2MoVA686785155047248196 21Cr12MoV6008001440 27 245~29055010813725Cr2Mo1V504724813920CrIMo1V1A735835145047248~293--20Cr1Mo1VNbTiB0L.9785145039 255~30255018221020Cr1Mo1VTi5039255~302570-17222Cr12NiWMoV (C-422)09LOC612 32 11*277~331566124 13818Cr11NiMoNbVN7609301232 14*277~331--20Cr11MoNiNbVN7809001040 20*270~320--14Cr11W2MoNiVNb3220*277~331--12Cr10Mo1